 namespace local = ""
 namespace inh = inherit
 
 start = element library { book-element+ }
 
 include "included.rnc"
 
 author-element = 
    element author
    {
       attribute id { text },
       name-element,
       born-element,
       dead-element?
    }
 
 book-element = 
    element book
    {
       attribute id { text },
       attribute available { text },
       isbn-element,
       title-element,
       author-element*,
       character-element*
    }
 
 character-element = 
    element character
    {
       attribute id { text },
       name-element,
       born-element,
       qualification-element
    }
